Wbiting machine



. (N0M0de1.) Q

v J. B. HAMMOND.

' TYPE WRITING MACHINE.

" No; 290,420; Patented Dec. 18,1883;

WITNESSES: v I Q ATTORNEYS f UNITED STATES Par nwr OFFICE.-

JAMES B. HAMMOND, on NEW YOR N. v.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 290,420, dated December 18, 1883.

/ Application filed October 19,1883. (N model) To all, whom it may concern.-

Be it known that I, JAMES B. HAMMOND, a citizen of the United States, residing in the city, county, and State of New York, have invented anew and useful Improvement in Type Vriting Machines, of which the following is a specification.

My invention relates to that class of type-- writing machines for which several Letters Patent have heretofore been issued to me, of which Nos. 232,402, 249,930, and 253,475 may be particularly referred to 5 and the obj eet of my improvement is to avoid the difficulties and complications of mechanism incident to a machine in which the type-wheel moves in either direction from a normal position. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a vertical sectional and Fig. 2 '1. plan view.

. Only so much of the mechanism of a typewritingmachine is shown in the drawings as is necessary to a full understanding of my invention. The key-levers B are fulcrumed on knifeedged rib A, and operate to elevate the stoppins 0, guided by the stationary plate D.

On the frame of the machine are mounted two driving-levers, as G, having horizontal and vertical driving arms. They are mounted on shaftH in the manner shown, to secure a rigid bearing. Their horizontal arms are so disposed over j;-he key-levers that a varying amount of movement is imparted to said arms, which increases as the'distance of the operated key-lever from the fulcrum of said driving-levers decreases-the greater the move ment of the driving-lever the greater of course the movement of the typeseginent.

F represents a guard-plate; 'N, a shouldered shaft passing through frame It, capable of being elevated by mechanism (not shown) and depressed by a spring, 112, whose lower end presses against a collar (not shown) on the shaft.

I represents the paper-carriage guide-rod.

N represents the type-segment shaft, and M. means for holding. the type-segments thereon he part of the mechanism so far referred to isclaimed in this application, as the same is embraced in an application filed on the 20th day of September, 1883.

On the 'segmentshaft are mounted two typesegments, k and Z, each carrying a portion of the total number of characters required. The arrangement of characters preferred is to confine lower-case letters or small capitals to the upper horizontal row of each type-segment, large capitals tothe second-horizontal row, and figures and punctuation-marks to the lower row, adding also to the upper and middle rows such few punctuation-marks as are of frequent occurrence; The type-'faees of these two type segments are disposed as shown in Fig. 1, and each, when operated, is brought into proper position opposite the. impression hammer. \Vhen the segment-shaft is elevated, both rise together'and equally to bring the second or third line or now of type thereon into alignment with the impression hammer. (Not shown.) Type-segment k is provided with a sleeve, a, which is mounted on the shaft N, and abuts against the shoulder on the same. Type-segment b is provided with a like but larger sleeve, 1, which surrounds the sleeve a of segment k, and also abuts against the short]- der on the shaft. The upper end of sleeve 1) also abuts against a shoulder on sleeve a, to prevent vertical displacement. The nut M, which screws onto the diminished end of shaft N, holds the type-segments against vertical displacement.

Secured to each type-segment is ad'ependin g connecting-pin, 0, which. slides through an opening in a link, f, whose opposite end is pivoted by means of a screw, 9, or any other suitable means, to an earon the vertical arm of driving-lever G. Each type-segment has its own pin, link, and driving-lever, and either one can, therefore, be operated and returned to normal position without moving or disturbing the other or its driving mechanism. Each driving-levcr is returned to operative position bya spring, (not shown,) and being positively connected with its type-segment, returns the latter also to normal position. Two stop-arms,

r and s, are provided, the former having a sleeve, 0, and the latter a sleeve, (1, the latter surrounding the former and the former sur- 10o rounding type-segment sleeve 0. The lower ends of both sleeves c and (I rest on frame R,

and the outer sleeve, (1, is provided with a flange or rib,which fits the groove of a roller, E, secured to plate R, and prevents vertical displacement. Sleeve 0 may be guarded against displacement by a suitable connection with sleeve d. Each stop-arm sleeve is provided with a lug or projection, t, for co-operation IO with the pins e of the two type-segments. These lugs are placed a definite distance from the stop-arms, and for this distance the pins 0 can movewithout moving the stop-arms, the purpo: e of which arrangement will be presently explained.

It will be observed that the pin 0 upon the return of the segment will comein contact with the stop-arm of that segment, and cause it to return to its normal position; but for the purpose-of securing independent, and therefore more rapid, movement of the stop-arm, I prefer to provide each stop-arm with a light returning-spring,wl1e ebyit may be returned to its normal or starting position before the pin e has reached it. A. central pin, 2, arrests both stop-arms at this normal or starting position.

The normal position of the type-segments is represented by type-segment k in Fig. 2. The distance of the forward end of each segment from the impression-point is equal to the circumferential length of the type-face, and this space is required in order that each type-segment may oscillate 'to the full extent of its movement without interfence with the other; or, in other words, the normal position of each type-segment is outside the field of oscillation of the other. The extent of this field is about equal to twice the circumferential length of the type-segment face.

As each type-segment has to oscillate a distance substantially equal to its circumferential length before the letter nearest the impression-point is in position to effect an impression, it is evident that space is provided for the application of inking-rollers, past which.

the segments may oscillate to receive ink before reaching their printing position; but this feature or combination, involving inking-rollers, is not claimed herein, as it will form the subject of a future application.

The operation of the mechanism described is as follows: Depression of a right-handkeylever tilts the right-hand driving leveiywhose vertical driving-arm, moving to the rcar,oscillatcs, through ping and link f, the right-hand type-segment, moving it to the left from its normal position. \Vhen the type-segment has been moved a distance equal about to its circumferential length, its pin a strikes the lug t -of the right-hand stop-arm, s, and for the remainder of the forward movement type-segnent and stop-arm move together until the stop-arm arrests the type-segment by reason of its contact with the proper stop-pin. \Vhen the key-lever is released, the spring, before described as arranged to operate on driving-lever G, returns the type'scgment l to its nor- -ma-l position, and a spring also returns the said stop-arm to its normal position. During this oscillation and operation of the right-hand t'ype-segment and driving mechanism thelei'thand ty pe-segment and its driving mechanism have been at rest. XVhen a left-hand key-lever is operated, the left-hand type-segment is oscillated, in the same manner as before described with regard to the right-hand typesegment.

By reason of the extent of movement permitted to pin 6 between the stop-arm and its ln g before it comes in contact with either, the considerable advantage is secured that thekeylever whichhas moved the typeseg'ment need only be returned half-way to position before another key -lcver operating the same typesegment can be depressed, which permits freedom. of movement in the fingering, and avoids the necessity of returning eachkey-lever to. position before the next one pertaining to the same segment is touched. The construction also gives thesame flexibility and freedom of movement in the use of keys on opposite sides.

Another advantage is that a convenient space is secured for the location'of inking-rollers, thus permitting an inking-ribbon to be dispensed. with.

. What I claim, ters Patent, is-

1. The combinatiomwith two type segments,

and desire to secure by Leteach carrying aportion of the total number of characters desired and both arranged in the same plane,-of a series of key-levers and two intermediate driving mechanisms independent of each other, all substantially as d escribed.

2. The combinatiomwith two typo-segments, each carrying a portion of the total number of characters desired and mounted on the same shaft with the two typefaces arranged in the same circumferential line, of a series of keylevers and two separate intermediate driving mechanisms, all substantially as described.

3. The combination,with two type-segments, each carrying a portion of the total number of characters desired and mounted on the same shaft with the two type-faces arranged in the same circumferential line, of a series of key-levers,andaseparateintermediatedrivingmechanisin for each type-segment positively connected thereto, all substantially as described.

4. The combination, with two independent type-segments mounted on the same shaft and supplementary to each other, as described, of two independent stop-arms, two independent driving mechanisms, and a series of key-levers, all substantially as described;

5. The combination, with two independent type-segments supplementary to each other, as described, mounted on the same shaft and lying in the same circumferential line, of aseries of key-levers and two separate intermediate driving means for independentlyoscillating each type-segment in one direction only IIO from a normal position, all substantially as described.

(3. The combination, with two typcsegments 'sn )ple1iienta1-y to each other, as described,

placed in the same plane and removed, when in theirnormal position, thedistance, substan tially, of their circumferential length from the impression-point, of two independent driving mechanisms and a series of key-levers for operatin g the same, all substantially as described.

7. A type-segment arranged in its normal position at'a distance equivalent to its circumferential length from the innprssion-point, a stop-arm provided with a lug located relw tively as described, and a pin or projection connected with the type-segment which has free movement for a certain distance between stop-arm andlug, and operates to move forward and return the stop-arm, in combinationwith key-levers and intermediate means for moving said type-segment, all. substantially as de-' scribed.

,8. The combination, with a type-segment, of aseries of key-levers and intermediate driving, mechanism consisting of a lever operated by the key-levers, a pin or proj eotion on the typewheel, and a link connected at its opposite ends to said lever and pin, substantially as.

described.

9. The combination, with two type-segments supplementary to each'other, as described,

- each provided with a sleeve, one fitting over the other and mounted on a shouldered shaft, of two stop-arnis, also provided with sleeves fitting over each other and over the outer sleeve of the type-segments.

10. The combination, with a shouldered shaft, of two type-segments supplcmentaryto each other, as described, and arranged in the same horizontal plane, each provided with a 49 sleeve, one fitting over the other, and the inner sleeve fitted to said shaft.

11. The combination, with a type-segment provided with a depending pin, of a seriesof key-levers, a driving-lever, and a li'nk,pro 4-5 vided with an opening through which the type segment pin may freely slide for the purpose .of permitting the typc-segmentto be elevated without disturbing its connection withthe driving mechanism.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' JAS. B. HAMMOND,

Witnesses:

F. L. MmnLEroN, J. B. THOMPSON. 

